Helix / Pro8 - 20-PRO-8 Category_Default Category/SXS/Engine Choose the compression ratio that

Choose the compression ratio that best matches your setup during checkout:

Upgrade to a more durable option over stock

CNC built in house here at Bikeman - St

and shock loads

Direct replacement for our 900 Patriot Big Bore

Helix / Pro8 - 20-PRO-8 Category_Default Category/SXS/Engine Choose the compression ratio thatOptimize ACCELERATION AND QUICKER BACK SHIFTING WITH OUR PERFORMANCE HELIX. Our custom and proprietary cut angle maximizes performance. Recommended use with our clutch weights, primary spring, and secondary spring. This will help bring your machine alive, especially after adding heavy accessories, and different tires to your machine. 20 PRO 8